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From: Frank Krygowski <frkrygow@sbcglobal.net>
Newsgroups: rec.bicycles.tech
Subject: Re: Helping a tourist with STI problems
Date: Fri, 23 May 2025 22:43:55 -0400
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On 5/23/2025 1:07 PM, pH wrote:
> On 2025-05-23, AMuzi <am@yellowjersey.org> wrote:
>
>> I have one index bike, a Raleigh Sports 3 speed. No friction
>> mode; shifts perfectly for the last 54 years.
>>
> 
> Oooo! Is it the venerable 'AW' or one of the more rarer breeds? 

Mine, on my about-town bike, is an AW.

  Isn't there
> one that has an extra low low speed (can't really say "gear")?
> 
> I remember Jobst commenting that he kept an AW 3 speed body for his kids to
> dis-assemble and assemble as a puzzle....

A tricky puzzle for some! I acquired mine from a friend, who 
disassembled it then couldn't get it working again.

I had our school machinist do a cutaway of another one (which required 
annealing certain parts), in which I painted the inner parts to match a 
"how it works" poster from Sturmey-Archer. That was a display in my 
laboratory for a long time.

Planetary gearsets are used in other applications, but are not commonly 
understood.


-- 
- Frank Krygowski